Unique Characteristics of Prepubertal Onset Systemic Lupus Erythematosus

Area of Science:

• Pediatric Rheumatology
• Immunology
• Genetics

Background:

• Pediatric systemic lupus erythematosus (pSLE) is a chronic autoimmune disease with varied presentations.
• Understanding the influence of age at disease onset is crucial for tailored management and research.

Purpose of the Study:

• To investigate how age at disease onset impacts disease expression and outcomes in pediatric SLE.
• To identify unique characteristics of prepubertal-onset pSLE.

Main Methods:

• Retrospective study of 103 Omani pSLE patients.
• Comparison of epidemiological, clinical, serological, treatment, and outcome data across prepubertal, pubertal, and postpubertal onset groups.
• Univariate statistical tests were employed for analysis.

Main Results:

• Prepubertal onset pSLE (n=39) showed a higher frequency of familial SLE (61%) and distinct clinical features, including increased renal disease (51%) and cutaneous manifestations (74%).
• Laboratory findings in the prepubertal group included higher rates of anti-cardiolipin antibodies (47%), ANCA (62%), and low complement levels (97%), with lower SSA/SSB antibody positivity.
• Disease severity (SLEDAI) and damage (SLICC DI) scores did not significantly differ across age-at-onset groups.

Conclusions:

• Prepubertal onset pSLE in Arab populations exhibits distinct clinical and immunological characteristics.
• The high incidence of familial SLE and consanguinity suggests a significant role for genetic factors in the pathogenesis of prepubertal pSLE.
• These findings highlight the need for further research into the genetic underpinnings of early-onset pSLE.